So I was thinking about new vehicles and how we can pretty much adjust the settings to our tastes and then I thought, "Wait! We have the submarine idea! What if for land you had an option to turn into a blimp!"
The styles could be left the same, but maybe have some transformation to distinguish the Submarine/Blimp from a submarine or blimp.
My ideas for the Submarine are: average buggy-like speed acceleration and speed
My ideas for the Blimp are: rising and falling are average like jet. Movement in sky is no more than 50-60 mph with a weak acceleration. This is good to get someone who is on land or in the sky.
This vehicle would be great for worlds in the future that are underground and have some parts of land.
It has is pros and cons, but it would be a unique and helpful vehicle. It would even stimulate the creation of new worlds specifically for it!
As time went on, Olim had been updating his submarine in the comments. The most updated one (bottom right corner of post if you can't find it in comments) seems practical for the submarine, while the more round ones in the beginning can be the blimp when it transforms.
Please comment on what you think!
Eric
EDIT 6/7/11: This summer I might design a Submarine/Blimp of my own in Cheetah 3D.